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Chimeric MOMP: Expression of a Chlamydia Vaccine Candidate in Arabidopsis thaliana and Escherichia coli
Örebro University, School of Science and Technology.
2011 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]


Yearly, 90 million people are infected with C. trachomatis. Even though it is easily treated with antibiotics the often-asymptomatic infection often spreads prior to detection. A vaccine is therefore of great interest. A chimeric major outer membrane protein (MOMP) of C. trachomatis has in earlier studies proved to contain the epitopes necessary for immunization. In this thesis the chimeric MOMP gene was cloned and expressed in E. coli. Furthermore, the expression of the protein was analyzed in previously transformed A. thaliana.

Materials and Methods

The chimeric MOMP gene was cloned into E.coli. Following vector amplification, the gene was expressed and the protein purified by affinity chromatography. 

Seeds from different lines of previously transformed A. thaliana were screened by PCR. Hits were then analyzed by western blot. 


The results show successful cloning and expression of the chimeric MOMP gene in E. coli. The following protein purification did result in purified protein, however in low concentration.

For the A.thaliana lines, the presence and correct orientation of the gene was verified in some of the lines screened. The B7 line was verified to express the protein.


The low concentration of purified protein in E.coli was probably due to un-optimized imunnoprecipitation conditions. In expression analysis of A. thaliana, purification of plant samples by immunoprecipitation prior to running western blot gave results, whereas running un-purified samples in urea buffer did not, probably due to interfering proteins in wild type plants.

Place, publisher, year, edition, pages
2011. , 11 p.
Keyword [en]
Chimeric MOMP, MOMP, Chlamydia trachomatis, Chlamydia vaccine, Arabidopsis thaliana, Major outer membrane protein
National Category
Natural Sciences
URN: urn:nbn:se:oru:diva-20113ISRN: ORU-NAT/BIO-GK-2011/1--SEOAI: diva2:448885
Subject / course
2011-09-22, Örebro universitet, Prismahuset, Örebro universitet, 701 82, Örebro, 09:00 (English)
Life Earth Science
Available from: 2011-12-12 Created: 2011-10-18 Last updated: 2011-12-12Bibliographically approved

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